Bed-spring of leather-splitting machines



UNITED STATES PATENT OFFICE.

JOHN B. TAY, OF NORTH WOBURN, MASSACHUSETTS.

BED-SPRING OF LEATHER-SPLITTING MACHINES.

Specification of Letters Patent o. 13,407, dated August 7, 1855.

To all whom t may ooncem:

Be it known that I, JOHN B. TAY, of North Voburn, in t-he county of Middlesex and State of Massachusetts, have invented an Improved Bed or Back Spring for Leather- Splitting Machines; and I do hereby declare that the same is fully described and represented in the following specification and the accompanying drawings, letters, gures, and references thereof.

Of the said drawings, Figure 1 is a top view of one of the said devices. Fig. 2 is a bottom or underside view of it. Fig. 3 is an end view of it.

In these drawings, A exhibits the bed rail which is formed with an elevation, r, (see Fig. 3) for supporting a sheet spring rest or head a, and a. series of separate springs b, Z), b, extending from a forming part of a plate B, as seen in Fig. 4, which is a top view of the plate and springs, the latter being formed by sawing parallel scores, c, o, c, &c., into the plate head from one edge of it toward the other.

The upper or rest plate is made of very thin metal and extends entirely over and covers the scores c, c, c, &c., and this prevents tlie leather from being creased or scored. while passing over it. The two plates are confined to the bed rail by screws al, d, such bed rail being provided with a series of screws, c, c, o, &c., and which pass upward through it and abut against the plate B, and are for the purpose of adjusting the top surface of the plate a, to its proper distance from the roller which is usually placed over it and between which and the back spring the leather to be split passes in its course to the edge of the splitting knife.

As the hide or sheet of leather usually varies more or less in thickness the spring bed will accommodate itself to its inequalities without producing creases in the lower surface of it, the spring plate or guard, a, operating to prevent such.

I/hat I claim is- The above described improved bed or back spring as composed of a thin guard or spring sheet of metal a, and a series of separate springs Z), ZJ, &c., united to or forming part of a plate B, as described.

In testimony whereof, I have hereunto set my signature this twenty-third day of June,

JOHN B. TAY.

Vitnesses EDWIN FULLER, CHARLES NICHOLS. 

